Participants in the cloud business model panel at last week's Tier 1 Summit included (from left) Tesh Durvasula of QTS, Anthony Foy of Interxion, Peak 10's Jeff Spalding, and David Linthicum of Blue Mountain Labs.

Last week's Hosting & Cloud Transformation Summit North America, sponsored by Tier 1 Research and The 451 Group, featured many industry CEOs and analysts discussing the issues surrounding hosting and the evolving cloud ecosystem. See More Scenes from the Tier 1 Summit for photos from day 2 of the conference.